The report also contained a whole heap of data and charts on the state of the economy, many of which do not make for pleasant reading. Business Insider pulled out six charts from the OECD's presentation that we feel illustrate best the economic impacts Brexit is having, and will have in future, on Britain's economy.

While the FTSE 100 and FTSE 250 — Britain's two main share indexes — have hit record highs since the Brexit vote, they have done so because of the large proportion of overseas firms in the index. Roughly 70% of revenues in the FTSE 100, for example, are derived from overseas. UK focused stocks have underperformed massively since the vote, as the chart shows.

Britain's labour productivity has lagged behind many of the world's other major economies for a long time, but Brexit has made things even worse, as evidenced by the divergence that can be seen at the far right of the chart below.

Inflation has pushed up prices for everyday goods and services, especially those that are imported. Wage growth, however has struggled to keep up. This has created a scenario where average Brits are getting actively poorer.

One of the main economic advantages of Brexit cited by Leave campaigners was that a fall in the value of the pound would make the UK more competitive in the global export markets. That doesn't seem to be happening.

The UK economy's reliance on London is well known, but that gap could get even bigger after Brexit as many of the UK's least economically prosperous regions rely heavily on EU funding. That funding will be removed after Britain leaves the bloc.

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